The MP said: “The boundaries were never that popular and there was a big question with Brexit whether it was wise to reduce the size of the Commons from 650 to 600 given that the Lords keeps increasing.”

Another senior Tory said that it would be “sensible” if another review was carried out by the Boundaries Commission to take into account more changes in population figures.

Mrs May’s predecessor David Cameron told every Conservative MP last year that they will be guaranteed a seat to fight at the 2020 election after unrest about the changes.

Downing Street has made clear to every sitting Tory MP that "no colleague will be left behind" following threats of a major rebellion over the boundary reforms.

The move was seen as an olive branch to Eurosceptic Tory MPs preparing to campaign for exit from the European Union in the upcoming referendum.